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Face normal vector at the boundary

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Old   March 14, 2016, 05:25
Default Face normal vector at the boundary
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Maximilian Transinger
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Dear all,

I am trying to implement a new contact angle model in a cylindrical sloshing tank.
Therefore, I introduce the x-component at the boundary as a kind of damping factor on my curved boundary. Meaning, boundary cells with a normal vector perpendicular to the x-axis should have a x-component of 0, cells with a normal vector parallel to the x-axis have a x-component, and so on.

I try to get the x-component as following:
Code:
scalarField normal_x=patch().Sf().component(0)/patch().magSf();
Compiling works, running the simulations also. But obviously in the results there is no difference at boundary regarding the x-direction.

Does anyone know different ways how to get the face normal vector?

Thank you!
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Old   March 14, 2016, 12:27
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Bloerb will become famous soon enough
http://openfoam.com/documentation/cp...ml/a00930.html

patch().nf () const - Return face normals.
patch().Sf () const - Return face area vectors.
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Old   October 21, 2019, 21:11
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Bidesh Sengupta
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Hi!


When I am writing the above code I am receiving error:
"
‘patch’ was not declared in this scope

"
Can anyone help me to understand the reason for this error.
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Old   July 12, 2020, 15:18
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Brian
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Hello, have you resolved this issue? I ran into the same problem.
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boundary condition, normal vector, patch field

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